- java.lang.Object
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- javax.crypto.KeyGeneratorSpi
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- com.ibm.crypto.hdwrCCA.provider.DESKeyGenerator
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public final class DESKeyGenerator extends javax.crypto.KeyGeneratorSpi
This class generates a DES key.This documentation describes a Service Provider Interface. It is provided for implementation insight only. This class is not intended to be called directly by application developers. Please consult the 'Java Cryptography Architecture Standard' for details on how to use this interface through a public standard class.
- NOTE:
- Certain operations may require specific hardware or software, or specific key types. See the rest of this document and the z/OS Unique Considerations Hardware Crypto Reference Guide for more details. Unsupported operations and/or combinations may result in a RuntimeException Hardware Error.
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Constructor Summary
Constructors Constructor Description DESKeyGenerator()
Verify the JCE framework in the constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected javax.crypto.SecretKey
engineGenerateKey()
Generates the DES key.protected void
engineInit(int keysize, java.security.SecureRandom random)
Initializes this key generator for a certain keysize, using the given source of randomness.protected void
engineInit(java.security.SecureRandom random)
Initializes this key generator with a source of randomness.protected void
engineInit(java.security.spec.AlgorithmParameterSpec params, java.security.SecureRandom random)
Initializes this key generator with the specified parameter set and a user-provided source of randomness.
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Method Detail
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engineInit
protected void engineInit(java.security.SecureRandom random)
Initializes this key generator with a source of randomness. It is not valid to specify a source of randomness for a key that will be generated as a secret hardware key.- Specified by:
engineInit
in classjavax.crypto.KeyGeneratorSpi
- Parameters:
random
- the source of randomness for this generator
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engineInit
protected void engineInit(java.security.spec.AlgorithmParameterSpec params, java.security.SecureRandom random) throws java.security.InvalidAlgorithmParameterException
Initializes this key generator with the specified parameter set and a user-provided source of randomness. If aCCAAlgorithmParameterSpec
is specified, and the requested key type is eitherCCAAlgorithmParameterSpec.SECURE_INTERNAL_TOKEN
orCCAAlgorithmParameterSpec.CKDS
, then the DES key will be generated as a secret hardware key. Generation of key encrypting keys is not supported.- Specified by:
engineInit
in classjavax.crypto.KeyGeneratorSpi
- Parameters:
params
- the key generation parametersrandom
- the source of randomness for this key generator- Throws:
java.security.InvalidAlgorithmParameterException
- ifparams
is inappropriate for this key generator.java.security.InvalidParameterException
- if the key size in the key generation parameters is not valid.
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engineInit
protected void engineInit(int keysize, java.security.SecureRandom random)
Initializes this key generator for a certain keysize, using the given source of randomness.- Specified by:
engineInit
in classjavax.crypto.KeyGeneratorSpi
- Parameters:
keysize
- the keysize. This is an algorithm-specific metric specified in number of bitsrandom
- the source of randomness for this key generator- Throws:
java.security.InvalidParameterException
- if the specified key size is not valid.
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engineGenerateKey
protected javax.crypto.SecretKey engineGenerateKey()
Generates the DES key.- Specified by:
engineGenerateKey
in classjavax.crypto.KeyGeneratorSpi
- Returns:
- the new DES key.
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